1 /*
2 * Copyright (C) 2006 Andreas Granig <agranig@linguin.org>
3 *
4 * This file is part of Kamailio, a free SIP server.
5 *
6 * Kamailio is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version
10 *
11 * Kamailio is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 */
21
22 #ifndef OPTION_TAGS_H
23 #define OPTION_TAGS_H
24
25 #include <strings.h>
26 #include "hf.h"
27 #include "keys.h"
28
29 #define F_OPTION_TAG_PATH (1 << 0)
30 #define F_OPTION_TAG_100REL (1 << 1)
31 #define F_OPTION_TAG_TIMER (1 << 2)
32 #define F_OPTION_TAG_EVENTLIST (1 << 3)
33 #define F_OPTION_TAG_GRUU (1 << 4)
34 #define F_OPTION_TAG_OUTBOUND (1 << 5)
35
36 #define OPTION_TAG_PATH_STR "path"
37 #define OPTION_TAG_PATH_LEN (sizeof(OPTION_TAG_PATH_STR)-1)
38
39 /* RFC 3262 (PRACK) */
40 #define OPTION_TAG_100REL_STR "100rel"
41 #define OPTION_TAG_100REL_LEN (sizeof(OPTION_TAG_100REL_STR)-1)
42
43 /* RFC 4028 */
44 #define OPTION_TAG_TIMER_STR "timer"
45 #define OPTION_TAG_TIMER_LEN (sizeof(OPTION_TAG_TIMER_STR)-1)
46
47 /* RFC 4662 (RLS) */
48 #define OPTION_TAG_EVENTLIST_STR "eventlist"
49 #define OPTION_TAG_EVENTLIST_LEN (sizeof(OPTION_TAG_EVENTLIST_STR)-1)
50
51 /* RFC 5627 */
52 #define OPTION_TAG_GRUU_STR "gruu"
53 #define OPTION_TAG_GRUU_LEN (sizeof(OPTION_TAG_GRUU_STR)-1)
54
55 /* RFC 5626 */
56 #define OPTION_TAG_OUTBOUND_STR "outbound"
57 #define OPTION_TAG_OUTBOUND_LEN (sizeof(OPTION_TAG_OUTBOUND_STR)-1)
58
59
60 struct option_tag_body {
61 hf_parsed_free_f hfree; /* function to free the content */
62 unsigned int option_tags; /* option-tag mask for the current hdr */
63 unsigned int option_tags_all; /* option-tag mask for the all hdr
64 * - it's set only for the first hdr in
65 * sibling list*/
66 };
67
68
69 #define IS_DELIM(c) (*(c) == ' ' || *(c) == '\t' || *(c) == '\r' || *(c) == '\n' || *(c) == ',')
70
71 /* from parser/parse_hname2.c: */
72 #define LOWER_BYTE(b) ((b) | 0x20)
73 #define LOWER_DWORD(d) ((d) | 0x20202020)
74 #define READ(val) \
75 (*(val + 0) + (*(val + 1) << 8) + (*(val + 2) << 16) + (*(val + 3) << 24))
76
77 /*!
78 * Parse HF body containing option-tags.
79 */
parse_option_tag_body(str * body,unsigned int * tags)80 static inline int parse_option_tag_body(str *body, unsigned int *tags)
81 {
82 register char* p;
83 register unsigned int val;
84 int len, pos = 0;
85 int case_found;
86
87 *tags = 0;
88
89 p = body->s;
90 len = body->len;
91
92 while (pos < len) {
93 /* skip spaces and commas */
94 for (; pos < len && IS_DELIM(p); ++pos, ++p);
95
96 val = LOWER_DWORD(READ(p));
97 case_found = 0;
98 switch (val) {
99
100 /* "path" */
101 case _path_:
102 if(pos + 4 <= len && IS_DELIM(p+4)) {
103 *tags |= F_OPTION_TAG_PATH;
104 pos += 5; p += 5;
105 case_found = 1;
106 }
107 break;
108
109 /* "100rel" */
110 case _100r_:
111 if ( pos+6 <= len
112 && LOWER_BYTE(*(p+4))=='e' && LOWER_BYTE(*(p+5))=='l'
113 && IS_DELIM(p+6)) {
114 *tags |= F_OPTION_TAG_100REL;
115 pos += OPTION_TAG_100REL_LEN + 1;
116 p += OPTION_TAG_100REL_LEN + 1;
117 case_found = 1;
118 }
119 break;
120
121 /* "timer" */
122 case _time_:
123 if ( pos+5 <= len && LOWER_BYTE(*(p+4))=='r'
124 && IS_DELIM(p+5) ) {
125 *tags |= F_OPTION_TAG_TIMER;
126 pos += OPTION_TAG_TIMER_LEN + 1;
127 p += OPTION_TAG_TIMER_LEN + 1;
128 case_found = 1;
129 }
130 break;
131 }
132 if(case_found==0) {
133 /* extra require or unknown */
134 if(pos+OPTION_TAG_EVENTLIST_LEN<=len
135 && strncasecmp(p, OPTION_TAG_EVENTLIST_STR,
136 OPTION_TAG_EVENTLIST_LEN)==0
137 && IS_DELIM(p+OPTION_TAG_EVENTLIST_LEN) ) {
138 *tags |= F_OPTION_TAG_EVENTLIST;
139 pos += OPTION_TAG_EVENTLIST_LEN + 1;
140 p += OPTION_TAG_EVENTLIST_LEN + 1;
141 } else if(pos+OPTION_TAG_GRUU_LEN<=len
142 && strncasecmp(p, OPTION_TAG_GRUU_STR,
143 OPTION_TAG_GRUU_LEN)==0
144 && IS_DELIM(p+OPTION_TAG_GRUU_LEN)) {
145 *tags |= F_OPTION_TAG_GRUU;
146 pos += OPTION_TAG_GRUU_LEN + 1;
147 p += OPTION_TAG_GRUU_LEN + 1;
148 } else if(pos+OPTION_TAG_OUTBOUND_LEN<=len
149 && strncasecmp(p, OPTION_TAG_OUTBOUND_STR,
150 OPTION_TAG_OUTBOUND_LEN)==0
151 && IS_DELIM(p+OPTION_TAG_OUTBOUND_LEN)) {
152 *tags |= F_OPTION_TAG_OUTBOUND;
153 pos += OPTION_TAG_OUTBOUND_LEN + 1;
154 p += OPTION_TAG_OUTBOUND_LEN + 1;
155 } else {
156 /* unknown (not needed) - skip element */
157 for (; pos < len && !IS_DELIM(p); ++pos, ++p);
158 }
159 }
160 }
161
162 return 0;
163 }
164
165
166 void hf_free_option_tag(void *parsed);
167
168 #endif /* OPTION_TAGS_H */
169